Asbestos fiber analysis results, NYC HS, Oct 2001

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, New York 10010

N.Y.C. Board of Education Approved N.Y. State ELAP #10879 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long Island City, NY 11101 Report Date; 10/25/01

ASBES'rOSFIBER ANALYSISBYTRMJSMISSION^ECTRON MICROSCOPY (TEM) With Fibei Identification cy Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDS) Method: AIERA Final Rule, FPA Federal Register (40 CFR, Part TGI), Vol. 52, No. 210, October 30, 1987

Sample Identification AnalysisParamet^^

Project/Site; New Stuyvesant U.S,, 345 Chambers St., NY, NY TEM Sample No.: 5758 62138 Exterior & Inte;rior of Building & Roof Date Received: 10/24/01 Grid Openings Analyzed;__ 4

Project Sample No.: 2 Average Grid Opening; 106.00 urn

Air Volumi;: 1935 liters Total Area Analyzed: C.0450 tnm2

Filter Tyjje: MCE 25 mm dian.. Pore Size: 0.45 urn Analytical Sensitivity; 22.2 s/mm2 Effective Aret; 3 S 5 mm2 0.0044 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct = 6um Struct/mrr>2 Struct/cc ngm/m3

Chrysotile; Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

Total asbe;stos (includes arroiguous structures) 0 0 0.0 0.0000 0 Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/A No Identification 0 0 0 0 0 0 0.0 0.0000 N/A

Totals (All Structures) 0 0 0.0 0 . 0000 N/A The estimated uncertainty of this analysis is 1 standard deviation.

Non-asbestos fiber i.d. (EDS/SAED): None detected Amphibole Asbesto.s Type: None detected

The Analysis was carried out in accordance with the approved TEM method. This laboratory is in compliance with the quality specified for the method.

Analyzed by: Report Reviewed by:

Roman Peysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

CITY_21MC1OO_OO31O7248

NYC-WTC_000185603